Transport times and distance with patient. Panels A, B, and C show observed transport times plotted versus distance for each of the transport ambulance systems: RA = road ambulance (n = 17), RW = rotor wing ambulance (n = 71), FW = fixed-wing ambulance (n = 68). Panel D shows the linear regression lines (with regression equations and R2 values in each panel, A, B C), with the observed minimal and maximal time and distance limits. Note in that even before 200 km transport distance, RA is slower than the others, even including transport preparation time. At transport distances above approximately 500 km, estimated times for transport with FW become shorter than those with the other systems.